Luk 21:20 “But when you see Jerusalem surrounded by armies, then realize that its devastation has come near.
Luk 21:21 Then let those who are in Judea disappear into the mountains, and let those who are inside the city go away, and let not those who are out in the countryside enter it,
Luk 21:22 for these are days of punishment, to fulfill all that is written.
Luk 21:23 It will be terrible for women who are pregnant and for those who are nursing infants in those days! Because there will be massive trouble in the land and wrath against this people.
Luk 21:24 They will fall by the edge of the sword and be led captive amid all nations, and Jerusalem will be trampled underfoot by the Gentiles, until the times of the Gentiles are fulfilled.

trouble in the land

Jesus continues to describe the terrible time that Jerusalem will face in the not too distant future from his prediction. God judged the land and people of Israel for their having rejected Christ as the Messiah. But Jesus warned believers that since this time of trouble was coming to the land, they had better hide, because the punishment would affect everyone there.

When God begins to punish a people, even his true believers will feel the effects of it.

LORD, when we are in the midst of trouble in our land, we trust you to limit your judgment so that some of us survive.